2784381868 has 12 divisors (see below), whose sum is σ = 5004362272. Its totient is φ = 1354564080.

The previous prime is 2784381851. The next prime is 2784381869. The reversal of 2784381868 is 8681834872.

It is not an unprimeable number, because it can be changed into a prime (2784381869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9406548 + ... + 9406843.

Almost surely, 2^2784381868 is an apocalyptic number.

It is an amenable number.

2784381868 is a deficient number, since it is larger than the sum of its proper divisors (2219980404).

2784381868 is a wasteful number, since it uses less digits than its factorization.

2784381868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18813432 (or 18813430 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The square root of 2784381868 is about 52767.2423763077. The cubic root of 2784381868 is about 1406.8342482326.

The spelling of 2784381868 in words is "two billion, seven hundred eighty-four million, three hundred eighty-one thousand, eight hundred sixty-eight".